Before glibc 2.16, fmtmsg() is not thread-safe. Since glibc 2.16, it is thread-safe, the patch can refer to URL: http://sourceware.org/git/?p=glibc.git;a=commit;h=7724defcf8873116fe4efab256596861eef21a94 Signed-off-by: Peng Haitao <penght@xxxxxxxxxxxxxx> --- man3/fmtmsg.3 | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/man3/fmtmsg.3 b/man3/fmtmsg.3 index f4b3d6f..3e3d3f9 100644 --- a/man3/fmtmsg.3 +++ b/man3/fmtmsg.3 @@ -222,6 +222,16 @@ is the string printed when a message of this class is processed by .SH VERSIONS .BR fmtmsg () is provided in glibc since version 2.1. +.SH ATTRIBUTES +.SS Multithreading (see pthreads(7)) +Before glibc 2.16, the +.BR fmtmsg () +uses a static variable that is not protected, so it is not thread-safe. + +Since glibc 2.16, the +.BR fmtmsg () +uses a lock to protect static variable, so it is thread-safe. +.\" Modified in commit 7724defcf8873116fe4efab256596861eef21a94 .SH CONFORMING TO The functions .BR fmtmsg () -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
